CN114475559A - Control method and device and vehicle - Google Patents

Control method and device and vehicle Download PDF

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Publication number
CN114475559A
CN114475559A CN202011172090.4A CN202011172090A CN114475559A CN 114475559 A CN114475559 A CN 114475559A CN 202011172090 A CN202011172090 A CN 202011172090A CN 114475559 A CN114475559 A CN 114475559A
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China
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vehicle
negative torque
condition
rotating speed
preset
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CN202011172090.4A
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CN114475559B (en
Inventor
周明旺
杨雪静
陈淑江
张庚楠
肖磊
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Great Wall Motor Co Ltd
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Great Wall Motor Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
    • B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B60W2510/244—Charge state
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

The invention provides a control method, a control device and a vehicle, wherein the method comprises the following steps: receiving an atmospheric pressure value sent by an engine of the vehicle or positioning information sent by a positioning module under the condition that the vehicle is detected to meet a static gear shifting condition; receiving a battery electric quantity value sent by a battery controller of the vehicle under the condition that the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value or the positioning information shows that the vehicle is in a plateau working condition; and under the condition that the battery electric quantity value is smaller than a preset battery electric quantity threshold value, generating a request prohibition negative torque signal and sending the request prohibition negative torque signal to the generator so that the generator stops requesting the negative torque and stops supplying power to the low-voltage load. According to the invention, when the vehicle is in a plateau working condition, the vehicle controller can be used for supplying power to a low-voltage load without driving a generator through an engine, so that the vehicle can be smoothly switched from the P gear or the N gear to the D gear or the R gear under the plateau static working condition.

Description

Control method and device and vehicle
Technical Field
The invention relates to the technical field of vehicle control, in particular to a control method, a control device and a vehicle.
Background
With the gradual development of science and technology, diesel vehicles are rapidly developed by virtue of the advantages of high efficiency, low energy consumption, long service life of vehicles, reliable use and the like.
When the diesel vehicle is in a plateau working condition, due to the fact that atmospheric pressure in a plateau area is low, fuel compression ignition in an engine of the diesel vehicle is insufficient, when the vehicle is switched from a Parking (P) gear or a Neutral (N) gear to a forward (D) gear or a Reverse (R) gear when the vehicle is static, and when the electric quantity value of a power battery is larger than a preset electric quantity threshold value, if the rotating speed of the engine is smaller than a target rotating speed, the power battery drives a Belt to Drive a Starter Generator (BSG) to drag the engine through assistance, and the engine is enabled to be maintained at the target rotating speed; and if the battery electric quantity value is smaller than or equal to the preset electric quantity threshold value, the BSG requests the negative torque to supply power for the low-voltage electric appliance.
Therefore, under the plateau working condition, the engine speed is low, so that the plateau static working condition cannot be switched from the P gear or the N gear to the D gear or the R gear.
Disclosure of Invention
In view of this, the present invention provides a control method, a control device and a vehicle, so as to solve the problem that the plateau static condition cannot be switched from the P gear or the N gear to the D gear or the R gear.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a control method, which is applied to a vehicle control unit of a vehicle, and the method includes:
receiving an atmospheric pressure value sent by an engine of the vehicle or positioning information sent by a positioning module under the condition that the vehicle is detected to meet a static gear shifting condition;
receiving a battery electric quantity value sent by a battery controller of the vehicle under the condition that the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value or the positioning information shows that the vehicle is in a plateau working condition;
and under the condition that the battery electric quantity value is smaller than a preset battery electric quantity threshold value, generating a request prohibition negative torque signal and sending the request prohibition negative torque signal to the generator so that the generator stops requesting negative torque and stops supplying power to a low-voltage load.
Optionally, after generating and sending the request prohibition negative torque signal to the generator when the battery electric quantity value is smaller than a preset battery electric quantity threshold, the method further includes:
receiving the rotating speed of the pump wheel end sent by the engine;
receiving the rotating speed of a turbine end sent by a gearbox controller of the vehicle;
and under the condition that the rotating speed of the pump wheel end is within a preset rotating speed range of the pump wheel end and the rotating speed of the turbine wheel end is within a preset rotating speed range of the turbine wheel end, generating a signal for allowing to request negative torque and sending the signal to the generator so that the generator starts to request negative torque, thereby supplying power to the low-voltage load.
Optionally, after receiving the turbine end rotation speed sent by the transmission controller of the vehicle, the method further comprises:
monitoring the gear shifting time of the vehicle under the condition that the rotating speed of the pump wheel end is not in the preset rotating speed range of the pump wheel end and the rotating speed of the turbine wheel end is not in the preset rotating speed range of the turbine wheel end;
and generating a gear shifting failure signal under the condition that the gear shifting time is greater than a preset gear shifting time threshold value.
Optionally, after monitoring the shift time of the vehicle, the method further comprises:
and under the condition that the gear shifting time is less than or equal to the preset gear shifting time threshold, generating the permission request negative torque signal and sending the permission request negative torque signal to the generator so that the generator starts to request negative torque to supply power to the low-voltage load.
Optionally, after receiving the atmospheric pressure value sent by the engine of the vehicle or the positioning information sent by the positioning module, the method further includes:
and generating and sending a permission request negative torque signal to the generator when the atmospheric pressure value is greater than or equal to the atmospheric pressure threshold value so that the generator starts to request negative torque to supply power to the low-voltage load.
Optionally, the stationary shift condition comprises: the gear lever position is switched to a forward gear or a reverse gear from a parking gear or a neutral gear, the master cylinder pressure of the brake pedal is greater than a preset master cylinder pressure threshold value, and the current vehicle speed of the vehicle is less than a preset vehicle speed threshold value.
In a second aspect, an embodiment of the present invention provides a control apparatus applied to a vehicle control unit of a vehicle, where the apparatus includes:
the atmospheric pressure value receiving module is used for receiving an atmospheric pressure value sent by an engine of the vehicle or positioning information sent by the positioning module under the condition that the vehicle is detected to meet a static gear shifting condition;
the battery electric quantity value receiving module is used for receiving the battery electric quantity value sent by a battery controller of the vehicle under the condition that the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value or the positioning information shows that the vehicle is in a plateau working condition;
and the request prohibiting negative torque signal generating module is used for generating a request prohibiting negative torque signal and sending the request prohibiting negative torque signal to the generator under the condition that the battery electric quantity value is smaller than a preset battery electric quantity threshold value, so that the generator stops requesting negative torque, and power supply to a low-voltage load is stopped.
Optionally, the apparatus further comprises:
the pump wheel end rotating speed receiving module is used for receiving the rotating speed of the pump wheel end sent by the engine;
the turbine end rotating speed receiving module is used for receiving the turbine end rotating speed sent by a gearbox controller of the vehicle;
the first request permission negative torque signal generation module is used for generating a request permission negative torque signal and sending the request permission negative torque signal to the generator under the condition that the rotating speed of the pump wheel end is within a preset rotating speed range of the pump wheel end and the rotating speed of the turbine wheel end is within a preset rotating speed range of the turbine wheel end, so that the generator starts to request negative torque to supply power to the low-voltage load;
the gear shifting time monitoring module is used for monitoring the gear shifting time of the vehicle under the condition that the rotating speed of the pump wheel end is not in the preset rotating speed range of the pump wheel end and the rotating speed of the turbine wheel end is not in the preset rotating speed range of the turbine wheel end;
and the gear shifting failure signal generation module is used for generating a gear shifting failure signal under the condition that the gear shifting time is greater than a preset gear shifting time threshold value.
Optionally, the apparatus further comprises:
and the third permission request negative torque signal generation module is used for generating a permission request negative torque signal and sending the permission request negative torque signal to the generator to enable the generator to start requesting negative torque so as to supply power to the low-voltage load when the atmospheric pressure value is larger than or equal to the atmospheric pressure threshold value.
In a third aspect, an embodiment of the present invention provides a vehicle including the control apparatus according to any one of the second aspects.
Compared with the prior art, the embodiment of the invention has the following advantages:
according to the control method provided by the embodiment of the invention, the vehicle control unit can receive the atmospheric pressure value sent by the engine of the vehicle or the positioning information sent by the positioning module under the condition that the vehicle is detected to meet the static gear shifting condition; when the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value or the positioning information shows that the vehicle is in the plateau working condition, determining that the vehicle is in the plateau working condition, and receiving a battery electric quantity value sent by a battery controller of the vehicle; under the condition that the battery electric quantity value is smaller than the preset battery electric quantity threshold value, a request prohibition negative torque signal is generated and sent to the generator, so that the generator stops requesting negative torque, and power supply to the low-voltage load is stopped.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart illustrating steps of a control method according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating steps of a control method according to a second embodiment of the present invention;
FIG. 3 is a schematic flow chart of vehicle shifting under a plateau static condition according to an embodiment of the invention;
fig. 4 shows a schematic structural diagram of a control device according to a third embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, a flowchart illustrating steps of a control method according to a first embodiment of the present invention is shown, where the control method may be applied to a vehicle controller of a vehicle.
As shown in fig. 1, the control method may specifically include the following steps:
step 101: and receiving an atmospheric pressure value sent by an engine of the vehicle or positioning information sent by a positioning module under the condition that the vehicle is detected to meet the static gear shifting condition.
Wherein the stationary shift condition comprises: the method comprises the steps that a Transmission Control Unit (TCU) detects the current gear lever position of a Vehicle, if the gear lever position is switched from a P gear or an N gear to a D gear or an R gear, the master cylinder pressure of a brake pedal detected by a Vehicle Control Unit (VCU) is larger than a preset master cylinder pressure threshold value, and the current Vehicle speed of the Vehicle detected by an Electronic Stability Program (ESP) is smaller than a preset Vehicle speed threshold value. When satisfying above-mentioned condition simultaneously, can confirm that the vehicle satisfies static condition of shifting, at this moment, the static flag bit of shifting of vehicle is the position of opening, then can detect the atmospheric pressure value through the engine, also can obtain the atmospheric pressure value that the vehicle current position corresponds through orientation module to send the atmospheric pressure value to VCU.
The preset master cylinder pressure threshold value can be 3 hectopascal (bar), the specific numerical value of the master cylinder pressure threshold value is not limited in the embodiment of the application, and calibration and adjustment can be carried out according to actual application scenes.
The preset vehicle speed threshold value can be 2 kilometers per hour (km/h), the specific numerical value of the preset vehicle speed threshold value is not limited in the embodiment of the application, and the preset vehicle speed threshold value can be calibrated and adjusted according to the actual application scene.
The Positioning module may include a Global Positioning System (GPS), and may acquire the current position of the vehicle in real time through the GPS and acquire an atmospheric pressure value corresponding to the current position.
The engine comprises an engine atmospheric pressure sensor, wherein the engine atmospheric pressure sensor can detect an atmospheric pressure value and send the atmospheric pressure value to the VCU.
And in the case that the vehicle is detected to meet the static gear shifting condition, after receiving the atmospheric pressure value sent by the engine of the vehicle or the positioning information sent by the positioning module, executing step 102.
Step 102: and receiving the battery electric quantity value sent by a battery controller of the vehicle under the condition that the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value or the positioning information shows that the vehicle is in the plateau working condition.
The preset atmospheric pressure threshold value refers to a critical value of the atmospheric pressure value, wherein the condition that the vehicle is in the plateau working condition is indicated when the threshold value is smaller than the threshold value, and the condition that the vehicle is in the normal working condition is indicated when the threshold value is larger than or equal to the threshold value.
The Positioning module may include a Global Positioning System (GPS), and may acquire the current position of the vehicle in real time through the GPS, and when the current position of the vehicle is in the plateau position, display that the vehicle is in the plateau condition.
The VCU determines that the vehicle is in the plateau working condition when receiving the atmospheric pressure value sent by the engine and when the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value or after receiving the positioning information and displaying that the vehicle is in the plateau working condition, and detects a Battery electric quantity value through a Battery controller (BMS), wherein the Battery electric quantity value refers to 48V Battery pack electric quantity and sends the Battery electric quantity value to the VCU.
The preset atmospheric pressure threshold value may be 0.7bar, and the specific numerical value of the preset atmospheric pressure threshold value is not limited in the embodiment of the present application, and may be calibrated and adjusted according to an actual application scenario.
And executing step 103 after receiving the battery electric quantity value sent by the battery controller of the vehicle under the condition that the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value or the positioning information shows that the vehicle is in the plateau working condition.
Step 103: and under the condition that the battery electric quantity value is smaller than a preset battery electric quantity threshold value, generating a request prohibition negative torque signal and sending the request prohibition negative torque signal to the generator so that the generator stops requesting negative torque and stops supplying power to a low-voltage load.
The Generator may be a Belt driven Starter Generator (BSG).
The preset battery electric quantity threshold value refers to a critical value of the battery electric quantity value, the fact that the electric quantity of the vehicle is enough is indicated when the value is larger than or equal to the critical value, the battery can supply power for the BSG and output torque to the outside, and the BSG can assist the engine to maintain the rotating speed of the engine. Less than the threshold indicates that the vehicle is not sufficiently charged.
The preset battery power threshold value can be 30%, the specific data of the battery power threshold value are not limited in the embodiment of the application, and the battery power threshold value can be calibrated and adjusted according to actual application scenes.
When the battery electric quantity value is smaller than the preset battery electric quantity threshold value, the vehicle battery electric quantity value is not enough, at the moment, a signal for forbidding the battery controller to request negative torque is generated and sent to the belt driving starter generator, so that the belt driving starter generator forbids to supply power to the low-voltage load, and the storage battery supplies power to the low-voltage load. The VCU can no longer control the engine to drive the BSG to supply power to the low-voltage load when the vehicle is in the plateau working condition, the condition that the vehicle is flameout due to the fact that the engine needs to be controlled to drive the BSG to supply power to the low-voltage load when the target rotating speed of the vehicle engine is maintained is avoided, and the vehicle can be switched to the D gear or the R gear from the P gear or the N gear under the plateau static working condition.
According to the control method provided by the embodiment of the invention, the vehicle control unit can receive the atmospheric pressure value sent by the engine of the vehicle or the positioning information sent by the positioning module under the condition that the vehicle is detected to meet the static gear shifting condition; receiving a battery electric quantity value sent by a battery controller of the vehicle under the condition that the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value or the positioning information shows that the vehicle is in a plateau working condition; under the condition that the battery electric quantity value is smaller than the preset battery electric quantity threshold value, a request prohibition negative torque signal is generated and sent to the generator to stop requesting negative torque by the generator so as to stop supplying power to the low-voltage load.
Referring to fig. 2, a flowchart illustrating steps of a control method according to a second embodiment of the present invention is shown, where the control method may be applied to a vehicle control unit of a vehicle.
As shown in fig. 2, the control method may specifically include the following steps:
step 201: and receiving an atmospheric pressure value sent by an engine of the vehicle or positioning information sent by a positioning module under the condition that the vehicle is detected to meet the static gear shifting condition.
Wherein the stationary shift condition comprises: the method comprises the steps that a Transmission Control Unit (TCU) detects the current gear lever position of a Vehicle, if the gear lever position is switched from a P gear or an N gear to a D gear or an R gear, the master cylinder pressure of a brake pedal detected by a Vehicle Control Unit (VCU) is larger than a preset master cylinder pressure threshold value, and the current Vehicle speed of the Vehicle detected by an Electronic Stability Program (ESP) is smaller than a preset Vehicle speed threshold value. When satisfying above-mentioned condition simultaneously, can confirm that the vehicle satisfies static condition of shifting, at this moment, the static flag bit of shifting of vehicle is the position of opening, then can detect the atmospheric pressure value through the engine, also can obtain the atmospheric pressure value that the vehicle current position corresponds through orientation module to send the atmospheric pressure value to VCU.
The preset master cylinder pressure threshold value can be 3 hectopascal (bar), the specific numerical value of the master cylinder pressure threshold value is not limited in the embodiment of the application, and calibration and adjustment can be carried out according to actual application scenes.
The preset vehicle speed threshold value can be 2 kilometers per hour (km/h), the specific numerical value of the preset vehicle speed threshold value is not limited in the embodiment of the application, and the preset vehicle speed threshold value can be calibrated and adjusted according to the actual application scene.
The Positioning module may include a Global Positioning System (GPS), and may acquire the current position of the vehicle in real time through the GPS and acquire an atmospheric pressure value corresponding to the current position.
The engine comprises an engine atmospheric pressure sensor, wherein the engine atmospheric pressure sensor can detect an atmospheric pressure value and send the atmospheric pressure value to the VCU.
And under the condition that the vehicle is detected to meet the static gear shifting condition, after receiving an atmospheric pressure value sent by an engine of the vehicle or positioning information sent by a positioning module, executing step 202 or step 203.
Step 202: and receiving the battery electric quantity value sent by a battery controller of the vehicle under the condition that the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value or the positioning information shows that the vehicle is in the plateau working condition.
The preset atmospheric pressure threshold value refers to a critical value of the atmospheric pressure value, wherein the condition that the vehicle is in the plateau working condition is indicated when the threshold value is smaller than the threshold value, and the condition that the vehicle is in the normal working condition is indicated when the threshold value is larger than or equal to the threshold value.
The VCU can determine that the vehicle is in the plateau working condition when receiving the atmospheric pressure value sent by the engine, when the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value, or after receiving the positioning information and displaying that the vehicle is in the plateau working condition, and detect a Battery electric quantity value through a Battery controller (BMS), wherein the Battery electric quantity value refers to 48V Battery pack electric quantity, and the Battery electric quantity value is sent to the VCU.
The preset atmospheric pressure threshold value may be 0.7bar, and the specific numerical value of the preset atmospheric pressure threshold value is not limited in the embodiment of the present application, and may be calibrated and adjusted according to an actual application scenario.
And executing step 204 after receiving the battery electric quantity value sent by the battery controller of the vehicle under the condition that the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value or the positioning information shows that the vehicle is in the plateau working condition.
Step 203: and generating and sending a permission request negative torque signal to a generator when the atmospheric pressure value is greater than or equal to the atmospheric pressure threshold value so that the generator starts to request negative torque to supply power to the low-voltage load.
The preset atmospheric pressure threshold value refers to a critical value of the atmospheric pressure value, wherein the condition that the vehicle is in the plateau working condition is indicated when the threshold value is smaller than the threshold value, and the condition that the vehicle is in the normal working condition is indicated when the threshold value is larger than or equal to the threshold value.
The VCU can determine that the vehicle is in a normal working condition when receiving an atmospheric pressure value sent by the engine, when the atmospheric pressure value is larger than or equal to a preset atmospheric pressure threshold value, or after receiving positioning information and displaying that the vehicle is not in a plateau working condition, and at the moment, the VCU generates a negative torque request allowing signal and sends the negative torque request allowing signal to the generator so that the generator starts to request negative torque to supply power to the low-voltage load.
Step 204: and under the condition that the battery electric quantity value is smaller than a preset battery electric quantity threshold value, generating a request prohibition negative torque signal and sending the request prohibition negative torque signal to the generator so that the generator stops requesting negative torque and stops supplying power to a low-voltage load.
The preset battery electric quantity threshold value refers to a critical value of a battery electric quantity value, the fact that the electric quantity of the vehicle is enough is indicated when the preset battery electric quantity threshold value is larger than or equal to the critical value, the battery can supply power for the BSG and output torque to the outside, the BSG can assist the engine, the engine can be assisted, and the engine is assisted to maintain the rotating speed of the engine. Less than the threshold indicates that the vehicle is not sufficiently charged.
The preset battery power threshold value can be 30%, the specific data of the battery power threshold value are not limited in the embodiment of the application, and the battery power threshold value can be calibrated and adjusted according to actual application scenes.
When the battery electric quantity value is smaller than the preset battery electric quantity threshold value, the vehicle battery electric quantity value is not enough, at the moment, a signal for forbidding the battery controller to request negative torque is generated and sent to the belt driving starter generator, so that the belt driving starter generator forbids to supply power to the low-voltage load, and the storage battery supplies power to the low-voltage load. The VCU can no longer control the engine to drive the BSG to supply power to the low-voltage load when the vehicle is in the plateau working condition, the condition that the vehicle is flameout due to the fact that the engine needs to be controlled to drive the BSG to supply power to the low-voltage load when the target rotating speed of the vehicle engine is maintained is avoided, and the vehicle can be switched to the D gear or the R gear from the P gear or the N gear under the plateau static working condition.
And if the battery electric quantity value is smaller than the preset battery electric quantity threshold value, generating a request inhibiting negative torque signal and sending the request inhibiting negative torque signal to the generator so that the generator stops requesting negative torque to stop supplying power to the low-voltage load, and then executing step 205.
Step 205: receiving the rotating speed of the pump wheel end sent by the engine; and receiving the turbine end rotating speed sent by a gearbox controller of the vehicle.
The engine may detect the pump-end speed of the vehicle and send the pump-end speed to the VCU. The TCU may detect a turbine-side speed of the vehicle and transmit the turbine-side speed to the VCU.
Receiving the rotating speed of the pump wheel end sent by the engine; and after receiving the turbine end rotating speed sent by the gearbox controller of the vehicle, executing step 206 or executing step 207.
Step 206: and under the condition that the rotating speed of the pump wheel end is within a preset rotating speed range of the pump wheel end and the rotating speed of the turbine wheel end is within a preset rotating speed range of the turbine wheel end, generating a signal for allowing to request negative torque and sending the signal to the generator so that the generator starts to request negative torque, thereby supplying power to the low-voltage load.
The preset rotating speed range of the pump wheel end refers to a rotating speed range corresponding to the stable rotating speed of the pump wheel end, and the preset rotating speed range of the turbine wheel end refers to a rotating speed range corresponding to the stable rotating speed of the turbine wheel end.
Under the condition that the rotating speed of the pump wheel end is within a preset rotating speed range of the pump wheel end and the rotating speed of the turbine wheel end is within a preset rotating speed range of the turbine wheel end, the successful gear shifting is indicated, at the moment, the VCU can generate a negative torque request allowing signal and send the negative torque request allowing signal to the generator so that the generator can start to request negative torque, and therefore power is supplied to the low-voltage load.
Step 207: and under the condition that the rotating speed of the pump wheel end is not in the preset rotating speed range of the pump wheel end and the rotating speed of the turbine wheel end is not in the preset rotating speed range of the turbine wheel end, monitoring the gear shifting time of the vehicle.
And under the condition that the rotating speed of the pump wheel end is not in the preset rotating speed range of the pump wheel end and the rotating speed of the turbine wheel end is not in the preset rotating speed range of the turbine wheel end, the VCU can acquire the gear shifting time of the vehicle.
And in the case that the pump wheel end rotating speed is not in the preset pump wheel end rotating speed range and the turbine wheel end rotating speed is not in the preset turbine wheel end rotating speed range, executing step 208 or executing step 209 after monitoring the gear shifting time of the vehicle.
Step 208: and generating a gear shifting failure signal under the condition that the gear shifting time is greater than a preset gear shifting time threshold value.
The preset gear shifting time threshold value refers to a critical value of gear shifting time, wherein the gear shifting failure of the vehicle is indicated when the critical value is larger than the critical value, and the gear shifting success is indicated when the critical value is smaller than or equal to the critical value.
The preset gear shifting time threshold may be 10 seconds, which is not specifically limited in the embodiment of the present application, and calibration adjustment may be performed according to an actual application scenario.
The VCU may generate a shift failure signal if the shift time is greater than a preset shift time threshold.
Step 209: and under the condition that the gear shifting time is less than or equal to the preset gear shifting time threshold, generating the permission request negative torque signal and sending the permission request negative torque signal to the generator so that the generator starts to request negative torque to supply power to the low-voltage load.
The preset gear shifting time threshold value refers to a critical value of gear shifting time, wherein the gear shifting failure of the vehicle is indicated when the critical value is larger than the critical value, and the gear shifting success is indicated when the critical value is smaller than or equal to the critical value.
In the event that the shift time is less than or equal to the preset shift time threshold, the VCU may generate and send the allow request negative torque signal to the generator for the generator to begin requesting negative torque to power the low voltage load and charge a battery pack.
For example, fig. 3 shows a schematic flow chart of vehicle shifting in plateau static condition provided by the embodiment of the present application, as shown in fig. 3, a TCU may detect a current gear, when it is detected that the gear is switched from P gear or N gear to D gear or R gear, an ESP detects that a vehicle speed is less than 2km/h, and a VCU detects that a formulated pedal master cylinder pressure is less than 3bar, a vehicle static shift flag bit is 1, that is, a static shift flag of the vehicle is an open bit, the VCU receives and determines an atmospheric pressure value sent by an engine, when the atmospheric pressure value is less than 0.7bar, the VCU receives and determines a battery electric quantity value of a power battery, and when the atmospheric pressure value is greater than or equal to 0.7bar, the VCU generates a signal allowing BSG to request negative torque so that the generator starts to request negative torque to supply power to the low-voltage load, when the battery electric quantity value is less than 30%, the VCU generates a negative torque signal for prohibiting the BSG request, the engine drives the transmission to output through the hydraulic torque converter, the engine acquires the rotating speed of a pump wheel end, the turbine end acquires the rotating speed of the pump wheel end, the VCU generates a negative torque signal for allowing the BSG request when the two rotating speeds are in a stable state, the VCU acquires the gear shifting time of the vehicle when the two rotating speeds are in an unstable state, the VCU generates the negative torque signal for allowing the BSG request when the gear shifting time is less than or equal to 10S, the gear shifting failure signal is generated when the gear shifting time is greater than 10S, and the BSG assists the engine when the vehicle starts when the battery electric quantity value is greater than or equal to 30%.
According to the control method provided by the embodiment of the invention, the vehicle control unit can receive the atmospheric pressure value sent by the engine of the vehicle or the positioning information sent by the positioning module under the condition that the vehicle is detected to meet the static gear shifting condition; receiving a battery electric quantity value sent by a battery controller of the vehicle under the condition that the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value or the positioning information shows that the vehicle is in a plateau working condition; under the condition that the battery electric quantity value is smaller than the preset battery electric quantity threshold value, a request prohibition negative torque signal is generated and sent to the generator to enable the generator to stop requesting negative torque, so that power supply to the low-voltage load is stopped.
Referring to fig. 4, a schematic structural diagram of a control device according to a third embodiment of the present invention is shown, where the control device is applied to a vehicle control unit of a vehicle.
As shown in fig. 4, the control device 300 may specifically include:
the atmospheric pressure value receiving module 301 is configured to receive an atmospheric pressure value sent by an engine of the vehicle or positioning information sent by a positioning module when it is detected that the vehicle meets a static gear shifting condition;
a battery electric quantity value receiving module 302, configured to receive a battery electric quantity value sent by a battery controller of the vehicle when the atmospheric pressure value is smaller than a preset atmospheric pressure threshold, or the positioning information indicates that the vehicle is in a plateau working condition;
and the prohibition request negative torque signal generation module 303 is configured to generate a prohibition request negative torque signal and send the prohibition request negative torque signal to the generator when the battery power value is smaller than a preset battery power threshold, so that the generator stops requesting a negative torque, and thus stops supplying power to the low-voltage load.
Optionally, the apparatus further comprises:
the pump wheel end rotating speed receiving module is used for receiving the rotating speed of the pump wheel end sent by the engine;
the turbine end rotating speed receiving module is used for receiving the turbine end rotating speed sent by a gearbox controller of the vehicle;
and the first request permission negative torque signal generation module is used for generating a request permission negative torque signal and sending the request permission negative torque signal to the generator under the condition that the rotating speed of the pump wheel end is within a preset rotating speed range of the pump wheel end and the rotating speed of the turbine wheel end is within a preset rotating speed range of the turbine wheel end, so that the generator starts to request negative torque, and power is supplied to the low-voltage load.
Optionally, the apparatus further comprises:
the gear shifting time monitoring module is used for monitoring the gear shifting time of the vehicle under the condition that the rotating speed of the pump wheel end is not in the preset rotating speed range of the pump wheel end and the rotating speed of the turbine wheel end is not in the preset rotating speed range of the turbine wheel end;
and the gear shifting failure signal generation module is used for generating a gear shifting failure signal under the condition that the gear shifting time is greater than a preset gear shifting time threshold value.
Optionally, the apparatus further comprises:
and the second permission request negative torque signal generation module is used for generating a permission request negative torque signal and sending the permission request negative torque signal to the generator under the condition that the shift time is less than or equal to the preset shift time threshold value so that the generator starts to request negative torque to supply power to the low-voltage load.
Optionally, the apparatus further comprises:
and the third permission request negative torque signal generation module is used for generating a permission request negative torque signal and sending the permission request negative torque signal to the generator to enable the generator to start requesting negative torque so as to supply power to the low-voltage load when the atmospheric pressure value is larger than or equal to the atmospheric pressure threshold value.
The specific implementation of the control device in the embodiment of the present invention has been described in detail at the method side, and therefore, the detailed description thereof is omitted here.
According to the control device provided by the embodiment of the invention, the vehicle control unit can receive the atmospheric pressure value sent by the engine of the vehicle or the positioning information sent by the positioning module under the condition that the vehicle is detected to meet the static gear shifting condition; receiving a battery electric quantity value sent by a battery controller of the vehicle under the condition that the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value or the positioning information shows that the vehicle is in a plateau working condition; under the condition that the battery electric quantity value is smaller than the preset battery electric quantity threshold value, a request prohibition negative torque signal is generated and sent to the generator to enable the generator to stop requesting negative torque so as to stop supplying power to the low-voltage load.
The embodiment of the invention also provides a vehicle which comprises the control device.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A control method, characterized in that, applied to a vehicle controller of a vehicle, the method includes:
receiving an atmospheric pressure value sent by an engine of the vehicle or positioning information sent by a positioning module under the condition that the vehicle is detected to meet a static gear shifting condition;
receiving a battery electric quantity value sent by a battery controller of the vehicle under the condition that the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value or the positioning information shows that the vehicle is in a plateau working condition;
and under the condition that the battery electric quantity value is smaller than a preset battery electric quantity threshold value, generating a request prohibition negative torque signal and sending the request prohibition negative torque signal to the generator so that the generator stops requesting negative torque and stops supplying power to a low-voltage load.
2. The method of claim 1, wherein after generating and sending to the generator a request inhibiting negative torque signal if the battery charge value is less than a preset battery charge threshold, further comprising:
receiving the rotating speed of the pump wheel end sent by the engine;
receiving the turbine end rotating speed sent by a gearbox controller of the vehicle;
and under the condition that the rotating speed of the pump wheel end is within a preset rotating speed range of the pump wheel end and the rotating speed of the turbine wheel end is within a preset rotating speed range of the turbine wheel end, generating a signal for allowing to request negative torque and sending the signal to the generator so that the generator starts to request negative torque, thereby supplying power to the low-voltage load.
3. The method of claim 2, further comprising, after said receiving a turbine end speed sent by a transmission controller of said vehicle:
monitoring the gear shifting time of the vehicle under the condition that the rotating speed of the pump wheel end is not in the preset rotating speed range of the pump wheel end and the rotating speed of the turbine wheel end is not in the preset rotating speed range of the turbine wheel end;
and generating a gear shifting failure signal under the condition that the gear shifting time is greater than a preset gear shifting time threshold value.
4. The method of claim 3, further comprising, after monitoring the shift time of the vehicle:
and under the condition that the gear shifting time is less than or equal to the preset gear shifting time threshold, generating the permission request negative torque signal and sending the permission request negative torque signal to the generator so that the generator starts to request negative torque to supply power to the low-voltage load.
5. The method of claim 1, wherein after receiving the atmospheric pressure value sent by the engine of the vehicle or the positioning information sent by the positioning module, further comprising:
and generating and sending a permission request negative torque signal to the generator when the atmospheric pressure value is greater than or equal to the atmospheric pressure threshold value so that the generator starts to request negative torque to supply power to the low-voltage load.
6. The method of claim 1, wherein the stationary shift condition comprises: the gear lever position is switched to a forward gear or a reverse gear from a parking gear or a neutral gear, the master cylinder pressure of the brake pedal is greater than a preset master cylinder pressure threshold value, and the current vehicle speed of the vehicle is less than a preset vehicle speed threshold value.
7. A control apparatus, characterized in that, applied to a vehicle controller of a vehicle, the apparatus comprises:
the atmospheric pressure value receiving module is used for receiving an atmospheric pressure value sent by an engine of the vehicle or positioning information sent by the positioning module under the condition that the vehicle is detected to meet a static gear shifting condition;
the battery electric quantity value receiving module is used for receiving the battery electric quantity value sent by a battery controller of the vehicle under the condition that the atmospheric pressure value is smaller than a preset atmospheric pressure threshold value or the positioning information shows that the vehicle is in a plateau working condition;
and the prohibition request negative torque signal generation module is used for generating a prohibition request negative torque signal and sending the prohibition request negative torque signal to the generator under the condition that the battery electric quantity value is smaller than a preset battery electric quantity threshold value, so that the generator stops requesting negative torque, and power supply to a low-voltage load is stopped.
8. The apparatus of claim 7, further comprising:
the pump wheel end rotating speed receiving module is used for receiving the rotating speed of the pump wheel end sent by the engine;
the turbine end rotating speed receiving module is used for receiving the turbine end rotating speed sent by a gearbox controller of the vehicle;
the first request permission negative torque signal generation module is used for generating a request permission negative torque signal and sending the request permission negative torque signal to the generator under the condition that the rotating speed of the pump wheel end is within a preset rotating speed range of the pump wheel end and the rotating speed of the turbine wheel end is within a preset rotating speed range of the turbine wheel end, so that the generator starts to request negative torque to supply power to the low-voltage load;
the gear shifting time monitoring module is used for monitoring the gear shifting time of the vehicle under the condition that the rotating speed of the pump wheel end is not in the preset rotating speed range of the pump wheel end and the rotating speed of the turbine wheel end is not in the preset rotating speed range of the turbine wheel end;
and the gear shifting failure signal generation module is used for generating a gear shifting failure signal under the condition that the gear shifting time is greater than a preset gear shifting time threshold value.
9. The apparatus of claim 7, further comprising:
and the third permission request negative torque signal generation module is used for generating a permission request negative torque signal and sending the permission request negative torque signal to the generator to enable the generator to start requesting negative torque so as to supply power to the low-voltage load when the atmospheric pressure value is larger than or equal to the atmospheric pressure threshold value.
10. A vehicle characterized by comprising the control device of any one of claims 7 to 9.
CN202011172090.4A 2020-10-28 2020-10-28 Control method and device and vehicle Active CN114475559B (en)

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CN102128107A (en) * 2011-03-14 2011-07-20 北京工业大学 Device and method for producing oxyhydrogen through vehicle-mounted oxyhydrogen producer using residual electricity supplied by internal combustion engine
CN109204013A (en) * 2017-06-29 2019-01-15 丰田自动车株式会社 The control method of fuel cell system and fuel cell system
CN109421694A (en) * 2017-09-05 2019-03-05 上海汽车集团股份有限公司 Control method, control device and the control equipment of generator powered

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6362536B1 (en) * 1999-08-10 2002-03-26 Honda Giken Kogyo Kabushiki Kaisha Apparatus and method for controlling power generation for hybrid vehicle
CN1371824A (en) * 2001-02-20 2002-10-02 本田技研工业株式会社 Controller for multi-power driven vehicle
CN102128107A (en) * 2011-03-14 2011-07-20 北京工业大学 Device and method for producing oxyhydrogen through vehicle-mounted oxyhydrogen producer using residual electricity supplied by internal combustion engine
CN109204013A (en) * 2017-06-29 2019-01-15 丰田自动车株式会社 The control method of fuel cell system and fuel cell system
CN109421694A (en) * 2017-09-05 2019-03-05 上海汽车集团股份有限公司 Control method, control device and the control equipment of generator powered

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